30 



LAMELLIBRANCHIATA. 



100. p. fisclieri, Zittel, Yoy. Novara, Falce., p. 53, pi ix., / 1, 2. 



Small, sub-orbicular, equivalve, radiately ribbed ; ribs numerous, keeled, 

 smooth, sub-equal ; interstices smooth ; ears unequal, striated. Height, 

 •53 ; length, -53. 



Localities. — Papakura ; Port Waikato ; Oamaru. 



101. P. delicatula, sp. mv. Sub-orbicular, rather compressed; 

 with about twenty-seven narrow distant smooth rays, the interstices 

 with three to five thin raised scaly lines ; ears unequal, with radiating 

 scaly ribs. Height, 2 ; length, 2. 



Localities. — Castle Point, Wellington ; Chatham Islands. 



102. P. semiplicata, sp. nov. Sub-orbicular, compressed, with 

 five or six plications near the umbo, which disappear before reaching 

 the margin, and numerous radiating ribs, the whole finely, but rather 

 strongly, concentrically striated. Height, 2'5(?). Fragments only. 



Localities. — Napier ; Castle Point, Wellington. 



103. P. secta, sp. nov. Sub-orbicular, longer than high ; equi- 

 valve ; left valve with seven to ten sharp flat plications, which are 

 simple at the umbo but each divided into four or five ribs towards the 

 margin ; depressions between the plicae with a single raised rib ; inter- 

 stices finely concentrically striated ; right valve with eight plicae, 

 narrower than on the other valve, and splitting into two or four ribs ; 

 interstices with two raised ribs, finely concentrically striated ; ears 

 sub-equal, radiately ribbed, and transversely striated ; a deep sulcus 

 divides them from the shell. Height, 4*1 ; length, 4*5 ; thickness, 1'4. 



Localities. — Callighan's Creek, Stafibrd Town ; Napier ; Mota- 

 nau (l) ; Hatter's Creek, Kanieri. 



104. P. venOSUm, sp. nov.; Hector, Cat. Col. Mus., 1870,^. 189. 

 Sub-orbicular, inequivalve ; right valve with eleven broad rounded 

 scaly ribs, with about two scaly lines in the depressions ; left valve 

 with nine narrow scaly ribs, with from four to six scaly lines between 

 them ; ears sub-equal, with radiating scaly ribs. Height, 15 ; length, 

 1-5. 



Localities. — Oamaru. 



105. P. hochstetteri, Zittel, Voy. Novara, Falce., p. 50, pi. xi., 

 f. 5a, not 5b. Sub-orbicular, rather longer than high, equivalve, equi- 

 lateral, thin, compressed ; both valves smooth ; ears sub-equal, obtuse, 

 smooth. Height, 2 ; length, 2"1. 



Localities. — Winton ; Caversham ; Oamaru ; Weka Pass ; Curiosity 

 Shop ; Mount Cookson ; Black-birch Creek ; Point Elizabeth ; Kai- 

 puki ; Cape Farewell ; Eaglan ; Aotea (Hochstetter) ; Wangarei ; 

 Broken Eiver (l). 



106. P. liectori, sp. nov. Sub-orbicular, thin, inequivalve, both 

 valves finely radiately striated ; the margin with rather broader ribs on 

 the inside ; ears sub-equal, finely transversely striated. Height, 4*1 ; 

 length, 4*6. 



Localities. — Chatham Islands ; Brighton; Broken Eiver (l). 



107. P. laticOStatUS, Gray; Cat. Marine Moll., p. 82. 

 Localities. — Wanganui (u) ; Shakespeare Cliff. 



